25634063449 has 2 divisors, whose sum is σ = 25634063450. Its totient is φ = 25634063448.

The previous prime is 25634063443. The next prime is 25634063453. The reversal of 25634063449 is 94436043652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19402539849 + 6231523600 = 139293^2 + 78940^2 .

It is a cyclic number.

It is not a de Polignac number, because 25634063449 - 2⁵ = 25634063417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25634063399 and 25634063408.

It is not a weakly prime, because it can be changed into another prime (25634063443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817031724 + 12817031725.

It is an arithmetic number, because the mean of its divisors is an integer number (12817031725).

Almost surely, 2^25634063449 is an apocalyptic number.

It is an amenable number.

25634063449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25634063449 is an equidigital number, since it uses as much as digits as its factorization.

25634063449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 46.

The spelling of 25634063449 in words is "twenty-five billion, six hundred thirty-four million, sixty-three thousand, four hundred forty-nine".